const o = {
  name: "Jack",
  birthday: new Date("2001-3-12 11:32:22"),
};
const s = JSON.stringify(o);
console.log(o); // { name: 'Jack', birthday: 2001-03-12T03:32:22.000Z }
console.log(s); // {"name":"Jack","birthday":"2001-03-12T03:32:22.000Z"}
console.log(JSON.parse(s)); // { name: 'Jack', birthday: '2001-03-12T03:32:22.000Z' }
